Process for mounting photographs, engravings, or the like in a dry condition.



J. NBUBRONNB R. PROCESS FOR MOUNTING PHOTOGRAPHS, ENGRAVINGS, OR THE LIKE IN A DRY GONDITION.

- I LPPLIOA'I'IOH IILI' D JULY 18, 1908. 956,723.

Mi 86628 I fla /22a?" jzzlz as vzzrozzjzer Patented May 3, 1910.

UNITED STATES PATENT OFFICE.

JULIUS NEUBBONNEB, OF GBONBERG, TAUNUS, GEEK ANY.

P31001388 FOR IOUNIING PHOTOGRAPHS, ENGRAVINGS, OR THE LIKE IN A DRY CONDITION.

Specification of Letters Patent.

Patented May 3, 1910.

Application filed July 18, 1908. Serial No. 444,212.,

avin or the 'Like in a whic the following is 9.

- an adhesive made of resin, or byp acing a layer of paper coated on-both sides with an adhesive made of resin between the photo graph or engraving and mount. Adhesives ma e of resin are disadvantageous in that they onlymelt at 100 to 130, crack when dry and necessitate considerable pressure to be stuck fast on the mount.

The resent invention relates to a process for ena ling gutta percha to be used in place of resinous adhesives, gutta percha becomin soft at about 60, always remains so phable as not to crack and become brittle, and only requires sli ht pressureto enable the mountingto be e ected.

It is known to insert a layer of gutta percha between a photograph and the mount; this is however disadvantageous in that a certain amount of adhesive exudes, vfrom the edges of the parts to be united on the applicatlon of a hot iron or of a glazing roller or the like. This objection is ObVlated according-to-thiiflpresent invention by coating paper or the e on both sides wit- I a solution of gutta percha or by passing it through the latter.

v The liquid at first re-. mains on the surface which when dry appears to be covered with a thick, white, easily dama ed coating; The paper is then exposed to t e rays of heat from a' hot plate or the like, whereby the liquid enters the ores of the paper so that the latter has e appearance of being thin, transparent and parchment like, especially when strong thin tissue aper is used, the paper is then dried. In t condition it is not capable-of sticking, so that it can therefore ,be rolled up without any fear of it sticking together.

The figure 1n the annexed drawin is a plan view of a sheet of paper with the ayers of gutta percha applied thereto, the difierent layers bemg shown partly exposed.

in Processes for Mounting In the accomfpanying drawing, a represents a sheet 0 paper, which may preferably be thin tissue paper, 6 represents a layer of gutta-percha on the upper side of the aper, and b a similar layer aifixed to the ower side of the paper. The aper treated with gutta-percha as described will be placed between a photo aph or engraving and the mount. Only y passing over a hot iron, or between the above mentioned rollers of a glazing machine or the like theadhesive soaked into the paper is slowly softened, so that it closely unites the paper on the one hand with the photograph, engraving or the like and on the other hand with the mount, without any of the adhesive exuding from the edges of the parts to be connected. The piece of paper soaked with gutta percha prevents the mount, or any j natter between the latter and the paper,from

attacking the photograph or engraving because the gutta percha insulates to a certain extent. At the same time the use of the so.- lution of gutta percha does not exclude the use of paste, dextrin and the like with it should such adhesives for any reason appear to be advantageous.

The use of gutta percha not only requires 'less heat and pressure but the process oi;

mounting also takes less time because the t me spent in obtaining the high temperature when using resin adhesives is saved. This high temperature also excludes the use of a number of photographic papers, this disadvanta e being obvlated by uslng tta percha. T is fact allows the back o the photo aph,

the same to heat rays, p acing the paper-- thus treated between a mount and the article to be mounted-thereon, and then applying a hot iron over the same.

2. The rocess for adhsively'mounting .photographsand paper en vings whic consists in coating paper on; th of its sides engraving and the like to becoate with gutta percha instead of using.

s and aper en vi'ngs wh1c p lidth of its sideswith a solution of gutta-percha, allowin to dry, then exposindg the pa er thus treate to the action of a egree 0 heat suitable for causing the gutta-percha to enter the pores of the 1Emper, allowing to dry, placing the paper t us treated between a mount and the artlcle to be adhesively mounted thereon,

and then applying a hot iron over the same.

In testimony whereof I have signed my name to this specification in the presence of 10 two subscribing witnesses.

JULIUS NEU'BRONNER.

Witnesses:

BERNHARD RUsER, JEAN GRUND. 

